incorrect bill

good day Vodacom, I so want to come one day with a positive review but this has never been the case. My billing does not make sense. when I call Vodacom online am being told it was for airtime advance, the number in question did have an advance but it was cleared, i paid the bill, actually you had even billed me for it in October, now when the number was recharged, yo took the amount owed on the advance but the consultant tells me the extra R164 on the supposed bill is for the advance, no Vodacom, for the past 10 years i have had a contract with you have never ripped me off like this. You bill me for the advance and still take it with a recharge, can you please rectify this when i add my bill it should be R1694.86, but on the app its a ridiculous R1863.96. can you get back to me and rectify this